Poly-ester composition for producing poly-ester heat-filling bottle and bottle blank
A technology of composition and polyester, which is applied in the field of polyester composition, can solve the problems of reduced crystallization effect, bottle atomization, and easy cracking reaction, etc., and achieve the effects of increasing production rate, increasing crystallization rate, and good transparency
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Embodiment 1
[0026] Sample A: Contains 50ppm BaSO 4 The polyester pellets, whose BaSO 4 Average particle size less than 0.1 microns; sample B, same polyester composition but without BaSO 4 Additives; their crystalline properties are compared in Table 1:
[0027] Sample A
Sample B
IV(dl / g)
0.781
0.799
L-value
79
80
b-value
-3.6
-3.3
Tg(°C)
82.2
82.4
Tc(°C)
181.2
188.7
Hc(J / g)
30
18.7
Tm(°C)
252.2
250.7
Hm(J / g)
27.2
19.8
[0028] Among them, L-value and b-value are Hunter's color values, and among them, Tg, Tc, Hc, Tm, and Hm are DSC heating up to 300°C at 20°C / min for the first time, and the second time after rapid cooling. The glass transition temperature, crystallization temperature, heat of crystallization, melting point and heat of fusion obtained by the second heating.
[0029] The results in the above table sho...
Embodiment 2
[0031] Sample C polyester composition: 99.0 mol% ethylene terephthalate, 1.0 mol% ethylene isophthalate, Fe 3 o 4 The particle size of the powder is 0.1-0.3 microns, the amount added is 35ppm of the total weight of the polymer, IV=0.60 after melt polymerization, and IV=0.77 after solid state polymerization;
[0032] Sample D has the same composition as sample C, but without the addition of Fe 3 o 4 powder.
[0033] Two kinds of polyester pellets of sample C and sample D were subjected to 160°C t 1 / 2 The comparison, the results are shown in Table 2, the results show that the addition of Fe 3 o 4 The powder does accelerate the rate of crystallization. Furthermore, after the two kinds of polyester granules are injected into hollow preforms, the bottle mouth is irradiated by a lamp tube at 160°C for 2-3 minutes, and then blown and the mold temperature is 168°C for 3 seconds to heat-set the bottle body. Finally, the crystallinity of the analysis bottle mouth and bottle body ...
Embodiment 3
[0037] 49 grams of sample E polyester pellets containing 100 ppm BaSO 4 , After being dried, it is injection molded into a hollow preform with a mouth diameter of 43 mm and a thickness of 5.3 mm. As a result, after blowing into a 1-liter polyester hot-fill bottle, white fog is caused due to too high crystallinity.
[0038] 49 grams of sample F polyester pellets contained 50 ppm BaSO 4 , with acceptable transparency under the same conditions.
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Abstract
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